Help needs about Tour Isb to Khunjrab

suggestion required of seniors for tour to Khunjrab from Islamabad
We are 5 ( i . my brother . my wife and my two baby's 5yo 1yo)

We have 2 bike one RP 200cc and Honda 125
Our estimated plan is

14 july 2016 to 23 July 2016

Day 1 Isb to Balakot via Mansehra
Day 2 Balakot to Chilas via Naran
Day 3 Chilas to Deosai via Astor Night stay in camping
Day 4 Deosai to skardu
Day 5 Skardu to Gilgit
Day 6 Gilgit to Sust
Day 7 Sust to Khunjrab and back to Sust
Day 8 Sust to chilas
Day 9 Chilas to Muzafarabad
Day 10 Muzafarabad to Islamabad